复制#include <unistd.h>   #include <pthread.h>   #include <string.h>   pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;   pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;   pthread_mutex_t mutex3 = PTHREAD_MUTEX_INITIALIZER;   pthread_mutex_t mutex4 = PTHREAD_MUTEX_INITIALIZER;   staticint sequence1 = 0;   staticint sequence2 = 0;   int func1()   {      pthread_mutex_lock(&mutex1);      ++sequence1;      sleep(1);      pthread_mutex_lock(&mutex2);      ++sequence2;      pthread_mutex_unlock(&mutex2);      pthread_mutex_unlock(&mutex1);      return sequence1;  }   int func2()   {      pthread_mutex_lock(&mutex2);      ++sequence2;      sleep(1);      pthread_mutex_lock(&mutex1);      ++sequence1;      pthread_mutex_unlock(&mutex1);      pthread_mutex_unlock(&mutex2);      return sequence2;  }   void* thread1(void* arg)   {      while (1)      {          int iRetValue = func1();          if (iRetValue == 100000)          {              pthread_exit(NULL);          }      }   }   void* thread2(void* arg)   {      while (1)      {          int iRetValue = func2();          if (iRetValue == 100000)          {              pthread_exit(NULL);          }      }   }   void* thread3(void* arg)   {      while (1)      {          sleep(1);          char szBuf[128];          memset(szBuf,上锁分 0, sizeof(szBuf));          strcpy(szBuf, "thread3");      }   }   void* thread4(void* arg)   {      while (1)      {          sleep(1);          char szBuf[128];          memset(szBuf, 0, sizeof(szBuf));          strcpy(szBuf, "thread3");      }   }   int main()   {      pthread_t tid[4];      if (pthread_create(&tid[0], NULL, &thread1, NULL) != 0)      {          _exit(1);      }      if (pthread_create(&tid[1], NULL, &thread2, NULL) != 0)      {          _exit(1);      }      if (pthread_create(&tid[2], NULL, &thread3, NULL) != 0)      {          _exit(1);      }      if (pthread_create(&tid[3], NULL, &thread4, NULL) != 0)      {          _exit(1);      }      sleep(5);      //pthread_cancel(tid[0]);      pthread_join(tid[0], NULL);      pthread_join(tid[1], NULL);      pthread_join(tid[2], NULL);      pthread_join(tid[3], NULL);      pthread_mutex_destroy(&mutex1);      pthread_mutex_destroy(&mutex2);      pthread_mutex_destroy(&mutex3);      pthread_mutex_destroy(&mutex4);      return 0;   }   1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.42.43.44.45.46.47.48.49.50.51.52.53.54.55.56.57.58.59.60.61.62.63.64.65.66.67.68.69.70.71.72.73.74.75.76.77.78.79.80.81.82.83.84.85.86.87.88.89.90.91.92.93.94.95.96.97.98.99.100.101.102.103.104.105.106.107.108.109.110.111.112.113.114.115.116.117.118.119.120.121.